I normally hear from Windows developer to say that their Windows market share is much bigger than the total of iOS and Android together. And the sales of Windows 8 has bypassed all the sales of iOS and Android from the beginning to now.
It is quite unfair to compare the whole Windows 8 with iOS or Android. And if we do take that demand into PCs and laptops, then why the hell we do not compare the supply side? It is very clear that if Windows 8 could be a shared platform between PCs, tablets and phones, then all the old software, all the old games would have beome compatible to the Windows 8 system in the short amount of time. And many apps for tablets and phones would be quite different than the ones in PC. No, I don’t mean technology, I am talking about the business model, the purpose of the software.
I don’t mean that iOS and Android is a better market than Windows Phone for indie business. These markets have become very competitive and continue being so. You either have to figure out a market niche or be very lucky.